Motor horn



Oct.A 14 1924. 1,511,347

w. KAlsLsNG MOTOR HORN Filed may 22; 1919 sheets-sheet 1 'N a FH Oct. 14 1924.

W. KAISLING MOTOR HORN FiledMay 22, 1919 I5 Sheets-Sheet Oct. 14 1924. 1,511,347

w. KAISLING MOTOR 'HORN Filed May 22, 1919 3 Sheets-Sheet 5 .Enfer-12021 Z/Zfl'i/lmgli@ Patented Oct. 14, 1924.

UNITED STATES PATENT OFFICE.V

WILLIAM KAISLING, OF CHICAGO, ILLINOIS, ASSIGNOR T01 KELLOGG SWITCHBOARD AND SUPPLY COMPANY, 0F CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

MOTOR HORN.

Application filed May 22,

To all whom t may Concern:

Be it known that L'lVinLniM KAIsLiNG, a citizen of the United States of America, reAY siding at Chicago, count-y of Cook, and State of l'llinois, have invented certain new and useful Improvements in Motor Horns, of which the following is a speciiication.

My invention relates to signaling devices and has to do more particularly with signaling horns such as are usually employed as warning signals on automobiles, launches and the like.

My invention is particularly directed to electrically operated signaling horns including a vibratile member such as a diaphragm, a small rotary motor, and an enclosing casing provided with a resonator or horn. The small rotary motor is located directly behind the diaphragm, whereby a. vibratory motion of the diaphragm may be derived from the drive shaft of the small rotary motor. The motor small and compact in construction and consumes but little current, and may be operated from a low voltage storage battery which is now practically universally used in conjunction with the ignition system of automobile engines.

A feature of my invention is the construction of the motor and its parts, and the adinstable means of the motor, as a whole, in relation. to the wear piece or contact button upon the diaphragm.

Another feature of my invention resides in the construction of the commutator which comprises a disk upon which the commutator segments are radially mounted.

Still another feature of my invention resides in the construction of the motor brush holder which is suitably supported in an ori- `tice in the field piece of the motor.`

The horn of my invention is simple in construction, efficient in its operation, low in current consumption and compact in its arrangement of parts, all of which parts are readily accessible for adjustment.

A further feature of my invention resides in mounting the motor at right angles to the diaphragm and in providing a circular serrated agitator on the shaft of the motor for engagement with a similarly formed member attached to the diaphragm thereby permitting the motor to be mounted concentrieally with respect to the diaphragm.

And still a further feature of my invention 1919. Serial N'o. 298,940.

relates to the mounting of the motor in the above mentioned manner in combination with a disk commutator whereby the cominutator of the motor is forced against the commutator brushes when the motor is operated. A, still. further feature of novelty re vlates, to the end thrust bearing I provide for the motor shaft.

The above features as pointed out, as well as others, will be more fully pointed out in the ensuing specication and claims.

Fig. l is a rear elevation of the signaling horn of my invention without the protective casing;

Fig. 2 is a right side elevation of Fig. l with the protective casing in section;

Fig. 3 is a top view of Fig. l;

F ig. 4 is a. sectional view along the line 4-4ofFig-lg W Fig. 5 is a sectional View along the line 5-.5 of Fig. 2;

Fig. 6 is a sectional view along the line 6-6 of Fig. l;

Fig. 7 is a perspective view of the commutator;

Fig. 8 is a perspective view of the ratchet which is secured to the shaft; andl F ig. 9 is a perspective view of the ratchet which is carried by the diaphragm of my device.

Referring now more in detail to my invention as illustrated, it comprises a resonating horn l, only a portion of which is shown, suitably secured to the front plate 2 in any suitable manner, as by means of the rivets 3. A mounting frame 4t is provided to which the apparatus as a whole, is secured, as will be more Afully hereinafter described. A diaphragm 5 of suitable material is placed within the cup-shaped portion 2 of the front plate 2 with a packing ring 6 of any suitable material, such as cork, between it and the front plate 2. A packing ring i' is then placed between -the diaphragm 5 and the mounting frame 4. The front plate 2, diaphragm 5, packing rings 6 and 7, and mounting frame e are then securely clamped together by means of bolts '8, thus circumferentially engaging and clamping the diaphragm in place between the frame 4 and front plate 2.

Referring now to the small rotary motor RM, it comprises a U-shaped field piece F, which is micrometrically adjustably supportedby the mounting plate 4. A pair of threaded studs 9 and 10 are provided which support the field piece F. Suitable openings 11 and 12 are u 'ovided in the lieldl piece F through which tlhe studs 9 and 10 extend. The mountingv plate 4 is provided with suitably. tapped openings-13, which receive the threaded studs 9 and 10, and the said studs 9 and 10 are provided with hexagonally shaped heads 14 and 15, which, when the studs 9 and 10 are in place', engage the tace of the plate 4. Lock nuts 16 and 1? are provided `tor the studs 9 and 10 and are used to secure the said studs to the mounting plate 4. The stud 9 is provided with a pair ot nuts 13 and 19, and lilewise the stud 10 is provided with nuts 2O and 21 for holding the motor in its adjusted position. To adjust the motor as a unit relative to the impact button or wear piece 22 secured to the diaphragm it' is only necessary to loosen nuts 13 and 2() on the studs 9 and 10,respec tively, and turn the nuts 19 and 21 to the right or lett, depending on whether' it is desired to move the motor RM away or towards the anvil 22. When the motor RM, as a whole, is adjusted in relation to the anvil 22, the nuts 1S and 2O are tightened to securely hold the motor in its adjusted position.

Field coils 23 and 24 are provided which are suitably mounted upon the pole-pieces 25 and 26 of the U-shaped held F, the said coils 23 and 24 being held in place in any suitable manner, as by means ot the straps 2i' and 23. Terminals 29 and 30 are insulatingly secured to the field piece F by means oif screws 31 and 32. These screws are also suitably insulated from the trame li", and nuts 33 and 34 are provided to secure the said' terminals 29 and 30 to the trameF. Terminal 29 serves as one terminal for the :tield winding 23 and the terminal' 30 serves as one terminal for the winding of the lield winding 24; Vllhe other terminal of the iield winding 23 extends to the brush C ot the motor ltlil and the other teri'nin'al ot the tield winding 24 extends to the brush D ot the motor RM. Thel screws 31 and 32 also serve as terminals for the external leads that connect to the circuit closer or batter-y (not shown).

A laminated armature 14R for the motor is centrally positioned between the pole'- pieces 25 and 2@ of the Ushaped lield piece l?, the said armature 141B being built' up ot a plurality of dislrs 35', which are iitted upon the shalt 3G in any suitable manner as by means ot a drive tit, the said laminations being. held together a unit'AtR by means ot rivets 37, and' the armature" siatt 36 is arranged with its axis at rightangles to the diaphragm; rlhe armature has a plurality oi' circular slotted orifices 33 extending lengthwise* of the armature' into which split sleeves of insulation`-39 are fastened'. The

windings 40 of the armature AR are contained in these insulated orifices and the terminals of these windings are connected to the terminals of the commutator C0.

The commutator C@ is suitably mounted upon the shaft 36 by means ot a drive tit, and it comprises a disk 41 of suitable insulation material and carries the commutator segments 42. rlhe segments 42 are radially disposed upon the disk 41 and are suitably spaced, as indicated at 43, to properly separate the commutator plates 42 'from each other. The plates 42 are secured to the disk 41 `in any suitable manner, as by means ot Arivet-s 44. Each plate 42 is provided with a terminal 45, which is secured to the bottom 'tace ot the disk 41 by means of the rivets 44, and each terminal 45 forms a terminal for the windings ot the motor armature RM.

l rotatably support the shaft 35 and its parts as a whole in bearing 47 in the lield piece F, and in bearing 43 in the mounting plate 4. End thrust bearing plates 49 and 50 are provided and are secured to the lield piece F by means ot screws 51 and 52. rlhe said plates 49 and 50 are provided with semi-circular oriiices which ht into an annular groove 53 formed in the shaft 36 to permit the armature RM and its parts, as a whole, to have only a small. amount ot longitudinal movements when the armature is rotated. lilotor brush holders C and D are suitably supported in the field piece F, and as both are similarly constructed, l will describe brush holder C only. The brush holder C comprises a shell 55 ot suitable insulating material, the said shell litting into a suitable opening in the .tield piece F. di shoulder 57 is lormed on the shell which bears against the inner iace ot the field piece F to prevent the said shell from being :forced through the oritice 5G. The motor brush 53 is made olf any suitable material, such as wire gauze, rolled to torm a brush, of a size to fit into the ori in the shell The lead to the brusi 53 is passed through a suitable slot 30 cut in the shell 55 and then soldered to the said brush 53. To obtain the proper bearing pressl of the brush 58 aga-inst the commutator e of the comniutator Ct), l provide coil springll which is placed in the shell behind' the brush `53, and the tension of the spring 61 is such that the brush 53 receives the proper bearing pressure to maintain it in engagement with the segments 42 ot the commutator C@ The end 36 of the shaft 36` `which protrudes through the been ing-.48 in the mounting plate 4 is threaded to receive a member 65, circular inshapc and provided with a plurality ot serrations or teeth 36 in the form ol face projections.

'A wear piece 22 is provided and secured to the diaphragm 5 in any suit-'able manner, as

' form terminals for external leads extend through the cap T0, but are insulated therefrom by means of insulation bushings '72,

In assembling the horn and attuning it, the nuts 18, 19, and 21 are loosened so as to permit the entire motor to slide along studs 9 and 10 to or from the diaphragm 5, and when the desired tone has been developed, that is, the proper relation between the member and the wear piece 22, the nuts 18, 19, 2O and 21 are set to lock the motor in its adjusted position.

From the foregoing it is to be noted that when the motor is rotated andthe agitator contacts the wear button that there is a tendency to force the motor away from the diaphragm against the end thrust bearing, and vdue to the Width of the annular groove 53 a small longitudinal movement of the shaft 36 to the left is permitted thus causing the commutator to make goed Contact with the motor brushes. Permitting slight longitudinal movement of the armature shaft with its attached agitator element 65 not only insures better electrica-l contact between the commutatoiand its brushes but produces a second and more important result; that of starting the camming action of the teeth of element 65 over theteeth of thc wear button or anvil 22. Where the armature shaft has no longitudinal movement the static friction between these toothed elements is sometimes so great that it cannot be overcome by the torque of the motor. he slight longitudinal movement of the armature shaft (permitted iii the present device), against the brush springs, allows a start of the camming action between the toothed elements and thereby gives the armature the opportunity to acquire sufficient momentum to stait operation. Vhen this is done the horn will continue to operate, even on a very low voltage.

lhile the invention has been described with particular reference to the details of construction, it should be understood that it is not limited thereto, as many changes and modifications may be made therein without departing therefrom, and I, therefore, wish to cover all such changes and modifications that come within the spirit and scope of the appended claims.

Having described my invention what I claim as new and desire to secure by United States Letters Patent is:

1. A signaling device of the character described comprising a mounting plate, a diaphragm secured to said plate, a motor for vibrating said diaphragm including a rotary shaft having bearing at one end in said plato and a field piece, said shaft extending through said field piece and provided with a groove, means engag'eable with said groove to form an end thrust bearing for said shaft and arranged to permitlimited longitudinal movement of said shaft, int-erengaging members on said diaphragm and motor shaft yfor producing relative movement between said members in the direction of the shaft axis and means for mounting the motor to permit movement bodily toward and away from the plate.

signaling device of the character described comprising a mounting plate, a diaphragm secured to said plate, a motor for vibrating said diaphragm including a rotary shaft having bearing at one end in said plate and a field piece, said shaft extending through said field piece and provided with a groove, a pair of members provided with sen'ii-circular openings adapted to fit into said groove to form means engageable with said `groove to form an end thrust bearing for said shaft and arranged to permit limited longitudinal movement of said shaft, iutei-'engagiiig members on said diaphragm and .iotor shaft for producing relative movement between said members in the direction of the shaftaXis and means for mounting the motor to permit movement bodily toward and away from the plate.

3. A signaling device of the character described comprising a mounting plate, a diaphragm secured to said plate, a motor for vibrating said diaphragm including a rotary shaft having bearing at one cud in said plate and a field piece, said shaft extending through said field piece and provided with a groove, .means carried by the field piece engageable with said groove to form an end thrust bearing for said shaft and arranged to permit limited longitudinal movement of said shaft interengaging members on said diaphragm and motor shaft :for producing relative movement between said members in the direction of the shaft axis, and means adjustably connecting the motor and plate.

4. A device of the character described including a mounting plate, a diaphragm secured to said mounting plate and provided with a cam, a motor provided with a shaft perpendicular to the diaphragm and having a cam for engaging the cam attached to said diaphragm, a field piece for the motor, a pair of longitudinal orifices in said field piece diametrically opposite each other, a pair of studs secured to said mounting plate and passing through said orifices in said field piece for micrometrically adjusting said field piece perpendicularly relative to said mounting` pla-te whereby the degree of engagement between the cam on said motor sha-ft and said diaphragm may be regulated, said motor shaft having one bearing in said field piece and one bearing in said mounting plate.

5, A device of the character described including a mounting plate, a diaphragm secured to said mounting plate and provided 'with a cam, a. motor provided with a shaft perpendicular to the diaphragm and hav ing a cam for engaging the cam attached to said diaphragm, a field piece for the motor, said field piece having a pair of longitudinal orifices diametrically opposite each other, a pair of studs secured to said mounting plate and passing through said orifices in said field piece, for micrometrically adjusting said field piece perpendicularly relative to said mounting plate whereby the degree of engagement between the cam on said motor shaft and said diaphragm may be regulated, said motor shaft having one bearing in said iield piece and one bearing in said mounting plate, and means secured to said field piece forming an end thrust bearing for said motor shaft.

6. A device of the character described, comprising a diaphragm, a motor for vibrating said diaphragm including a field piece and a rotary shaft having slight longitudinal movement, a disc commutator on said shaft, brush holders, spring pressed brushes slidably mounted in said holders, and means mounting said holders so that the brushes exert a pressure on the commutator in a direction tending to move the shaft toward the diaphragm interengaging members on said diaphragm and motor shaft for producing relative movement between said members in the direction of the shaft axis and means to oppose the thrust of said brushes and limit the longitudinal movement of said shaft.

7. A device of the character described, comprising a. diaphragm, a motor for vibrating said diaphragm including a field piece and a rotary shaft having slight longitudinal movement, a disc commutator on said shaft, brush holders, spring pressed brushes slidably mounted in said holders, and means mounting said holders so that the brushes exert a pressure on the commutator in a direction tending to move the shafttoward the diaphragm, interengaging members on said diaphragm and motor shaft for producing relative movement between said members in the direction of the shaft airis means to oppose the thrust of said brushes and limit the longitudinal movement of said shaft, and meansto adjust the motor with respect-to the diaphragm.

8. In a device of the character described, a mounting plate, a diaphragm carried thereby, a motor including a rotary shaft., coacting diaphragm vibrating cams on the shaft and diaphragm, a disc commutator on the shaft, spring brushes engaged with the commutator, said diaphragm and spring brushes acting in opposition to one another when the shaft is rotated, and means to permit limited longitudinal movement of the shaft in either direction.

9. ln a motor horn, a diaphragm, a motor for vibrating said diaphragm including a rotary shaft and a field piece, a commutator on said shaft, tubular insulators mounted in said field piece, brushes slidably mounted in s said insulators and engaged with the commutator and springs interposed between the insulators and brushes and acting to hold the insulators in the field piece and the brushes against the commutator and normally acting to impel the shaft toward the diaphragm interengaging members on said diaphragm and motor shaft for pro-V ducing relative movement between said members in the direction of the shaft artis.

10. In a motor horn, a diaphragm, a motor for vibrating said diaphragm including a rotary shaft and a field piece, a commutator on said shaft, tubular insulators mounted in said field piece and having fiangcs, brushes slidably mounted in said insulators enga-ged with the commutator and springs interposed between the insulators and brushes, adapted to hold the brushes against the commutator and the flanges against the field piece, said brushes acting on the commutator to impel the shaft toward the diaphragm and interengaging members on said diaphragm and motor shaft for producing relative movement between said members in the direction of the shaft axis.

ll.y In a motor horn, a mounting plate, a diaphragm secured thereto, a motor having an armature shaft journalled at one end in said mounting plate perpendicular to the diaphragm, and carrying means for vibrat ing said diaphragm, a field piece for the motor, the opposite end of said shaft being journalled in the field piece, said field piece being provided with diametrically opposite openings, threaded studs secured to the mounting plate and extending through said openings, nuts threaded on said studs micromet-rically adjusting the motor relative to the diaphragm and means connected to the field piece for moving the armature shaft with the motor. v

Signed by me at Chicago, in the county of Cook and State of Illinois, this 19th day of May, 1919.

WILLIAM KAISLING. 

